/*
 * Copyright 2010 Electronic Business Systems Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package gr.ebs.gssdroid.http;

import gr.ebs.gssdroid.async.FileMonitor;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.http.entity.AbstractHttpEntity;

public class GssFileEntity extends AbstractHttpEntity implements Cloneable {

    protected final File file; 
    FileMonitor monitor;
    int number;
    public GssFileEntity(final File file, final String contentType, FileMonitor monitor, int number) {
        super();
        if (file == null) {
            throw new IllegalArgumentException("File may not be null");
        }
        this.file = file;
        setContentType(contentType);
        this.monitor=monitor;
        this.number=number;
    }

    public boolean isRepeatable() {
        return true;
    }

    public long getContentLength() {
        return this.file.length();
    }
    
    public InputStream getContent() throws IOException {
        return new FileInputStream(this.file);
    }
    
    public void writeTo(final OutputStream outstream) throws IOException {
        if (outstream == null) {
            throw new IllegalArgumentException("Output stream may not be null");
        }
        monitor.setNumber(number);
        int count=0;
        InputStream instream = new FileInputStream(this.file);
        try {
            byte[] tmp = new byte[4096];
            int l;
            while ((l = instream.read(tmp)) != -1) {
                outstream.write(tmp, 0, l);
                count += l;
                monitor.setCurrent(count);
            }
            outstream.flush();
        } finally {
            instream.close();
        }
    }

    /**
     * Tells that this entity is not streaming.
     *
     * @return <code>false</code>
     */
    public boolean isStreaming() {
        return false;
    }

    public Object clone() throws CloneNotSupportedException {
        // File instance is considered immutable
        // No need to make a copy of it
        return super.clone();
    }

} // class FileEntity
